Message-ID: <52d213b9-12f1-df30-bb67-5c77cafda5e8@dewey.myzen.co.uk>
Date: 2017-09-15T12:57:41Z
From: Michael Dewey
Subject: How to add make option to package compilation?
In-Reply-To: <CAGAA5bekYRgM_bV_Rpv6Dgzr2PwTcWUJePjNUbuiCe+UcwgbyQ@mail.gmail.com>
In line
On 15/09/2017 13:30, Martin M?ller Skarbiniks Pedersen wrote:
> On 15 September 2017 at 14:13, Duncan Murdoch <murdoch.duncan at gmail.com>
> wrote:
>
>> On 15/09/2017 8:11 AM, Martin M?ller Skarbiniks Pedersen wrote:
>>
>>> Hi,
>>>
>>> I am installing a lot of packages to a new R installation and it takes
>>> a
>>> long time.
>>> However the machine got 4 cpus and most of the packages are written in
>>> C/C++.
>>>
>>> So is it possible to add a -j4 flag to the make command when I use the
>>> install.packages() function?
>>> That will probably speed up the package installation process 390%.
>>>
>>
>> See the Ncpus argument in ?install.packages.
>
>
> Thanks.
>
> However it looks like Ncpus=4 tries to compile four R packages at the same
> time using one cpu for each packages.
>
But you said you had lots to install so would that not speed things up too?
> From the documentation:
> "
> Ncpus: the number of parallel processes to use for a parallel
> install of more than one source package. Values greater than
> one are supported if the ?make? command specified by
> ?Sys.getenv("MAKE", "make")? accepts argument ?-k -j Ncpus?
> "
>
> [[alternative HTML version deleted]]
>
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--
Michael
http://www.dewey.myzen.co.uk/home.html